Marine mammal observations collected using aircraft by ConocoPhillips in the Chukchi Sea, 1989-1991 and submitted as part of the ConocoPhillips and Shell Joint Monitoring Program in the Chukchi and Beaufort Seas (NCEI Accession 0120533)

This data set contains vessel- and aircraft-based marine mammal surveys in the Chukchi Sea collected from 1989 to 1991. The aerial marine mammal surveys were conducted by EBASCO to determine the reponse of walrus to drilling operations in the northern Chukchi Sea at the Crackerjack, Burger and Popcorn prospects between June 29 and October 11, 1990 and at the Crackerjack and Diamond prospects between July 29 and October 8, 1991. The vessel-based marine mammal observations data were collected in the Chukchi Sea in 1989 - 1990. Monitoring efforts were implemented in 1989 by Shell to determine effects of exploratory drilling operations on walrus and polar bears. Results were submitted to regulatory agencies in 1990.